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Why silicon prefer to germiniuam?
Four reasons. First, it is a LOT cheaper and easier to get silicon. Germanium is a trace element in rocks. You need to mine and process lots of rock to get any germanium. Silicon is also known as sand--very easy to find. Second, germanium is heat sensitive. It's harder to solder a germanium device in than a silicon one because the heat can mess up the germanium. Germanium devices pretty much have to be soldered in by hand because you have to heat sink them, whereas silicon devices can be soldered in a soldering machine. Third, germanium's hazardous and silicon is generally not. People eat off glass plates, which are made from silicon. They do NOT eat from germanium plates, if they could even afford them. And fourth, germanium has a variable voltage drop--the higher the voltage, the greater the drop. If you pump 5000 volts into a silicon diode, you're going to get 4999.3v out the other side.
Name any 2 elements that are used in fabricating solar cells?
Silicon and germanium
Are there any pure forms of semi conductors other than germanium and silicon?
gaAs is semiconductor
Is there any advantages of silicon dioxide?
Yes, there are many advantages of silicon dioxide . one of them is that it is an important constituent in ore of mica as its formula is K2O.3Al2O3.6SiO2.2H2O as it is a triple salt
Why germanium not used in VLSI design?
Germanium cannot be used in any integrated circuit as its oxide is crumbly and water soluble (unlike silicon's oxide which is hard and stable). The only germanium integrated circuits ever made were very low density and the interconnects between components on the chip had to be done by hand under a microscope. There has been work done on integrated circuits using a silicon germanium alloy wafer, but this has not produced any production chips yet that I am aware of. If this can be made to work, I see no reason why this material could not be used in VLSI designs and even higher density designs.
What is the Difference between Si and Ge diodes?
The significant operational difference between a Si diode and a Ge diode is that Si diodes have a knee voltage of 0.7V needed to allow current flow and Ge diodes have an operational voltage of 0.3V to allow current flow.
What elements are used as impurities for doping germanium and silicon?
Any Pentavalent or Trivalent atom can be added to Silicon to create an "N" type or "P" type Material respectively. Which is used to create a PN Junction. Examples of Pentavalent atoms would be arsenic, antimony, and phosphorus, these Pentavalent atoms would be used to create an "N" Type material. Examples of Trivalent atoms are aluminum, boron, and gallium. Trivalent atom would be used to create "P" type material. I don't know why you would dope germanium, unless your talking about very old technology. Germanium use has slowed to a crawl since the discovery of intrinsic (pure) silicon.
Why germanium is not suitable for rectification?
Any semiconductor can be used for rectification, so germanium is suitable.However what you may be thinking of is power rectifiers. Germanium cannot operate with a junction temperature above about 60C, so this is a significant limitation on the power handling capability of germanium power rectifiers (even copper oxide or selenium power rectifiers can handle more power, so they were used for many years before quality silicon power rectifiers became available).
Is germanium chloride a solid or gas?
If you are referring to germanium tetrachloride, it is a colorless liquid. If you are referring to germanium dichloride, it is a yellow solid. Germanium does not have any chloride compounds that are gaseous at STP.
How are light emitting diodes manufactured?
Very much like any other solid state electronic component, except for the use of binary semiconductors (e.g. gallium aluminum indium phosphide) instead of simple silicon or germanium.
Why is germanium used in amplifiers?
For the same reason silicon is, they are both semiconductors and thus can be used to make transistors which can be used to build amplifying circuits.- - - - -It isn't any more. Aside from all the other drawbacks to Germanium (more expensive, noisier, less able to handle high voltages), it becomes "intrinsic" at a fairly low temperature. A pure semiconductor material is called intrinsic, it's also called an insulator. If you put the probes of your ohmmeter in a pail of sand - the material all silicon semiconductors start out life as - the meter will sit there and look at you like "now why did you do that?" To make it do its thing you have to "dope" it with boron or arsenic. Once you spice up your silicon (or germanium, in the case of this thread) with dopants, it's called extrinsic material. Well...what happened is Motorola built a bunch of transistorized car radios with germanium components back in the 1950s, and when the weather got hot the radios all quit working...because at slightly elevated temperatures germanium forgets it's doped.
What first super computer was introduced?
A supercomputer is defined as any computer with at least 10 times the speed and capacity of any standard computer of that time. Depending on which scholars you ask, one of the following computers was the first supercomputer:IBM NORC - 1952 - vacuum tubesUNIVAC LARC - 1960 - surface barrier germanium transistorsIBM 7030 Stretch - 1961 - diffusion germanium transistorsCDC 6600 - 1964 - diffusion silicon transistors
